parent

(23)The term “parent” means— (A)a natural, adoptive, or foster parent of a child (unless a foster parent is prohibited by State law from serving as a parent); (B)a guardian (but not the State if the child is a ward of the State); (C)an individual acting in the place of a natural or adoptive parent (including a grandparent, stepparent, or other relative) with whom the child lives, or an individual who is legally responsible for the child’s welfare; or (D)except as used inan individual assigned under either of those sections to be a surrogate parent.